Sure, one answer. Whenever a company owning a "platform" also competes on the platform and sets the rules to favor themselves, this hurts competition. Regulatio

Sure, one answer. Whenever a company owning a "platform" also competes on the platform and sets the rules to favor themselves, this hurts competition. Regulation should ensure a fair playing field on the platform, preventing companies from putting up barriers to competition. This is why Microsoft lost a lawsuit about bundling Internet Explorer onto the computing platform of Windows, this is why the platform of Google search has results rigged in favor of Google products, etc. This is also why Net Neutrality is a good idea, the company that controls the "platform" of the Internet being delivered to your device shouldn't get to stifle competition by making some websites cheaper or more expensive to visit. In this case, phones are a physical platform that should be opened to allow any software to run, and iOS is a software platform that should be opened to allow users to easily install alternative App Stores and easily install alternative applications not offered on the App Store.